为什么道歉的英语有2个词不一样apologetic和apologize

apologetic词典释义:

adj. 1. 辩护的,辩解的 2. 谢罪的,道歉的,认错的
n. 1. 辩解 2. 辩护 3. 护教学
网络释义:

1. 歉意的 2. 道歉的
常见搭配:
apologetic tone ;
"Oh, of course," said Rhoda with an apologetic smile, "they'd have to make some decent settlement of that hideous Polish business."“啊,当然”,罗达说着,负疚地微微一笑,“对于可怕的波兰事件他们总要适当地解决”

apologize
v. 道歉;对不起;表示歉意;赔个不是
I must apologize for having interrupted you. 我很抱歉打断你的话.I must apologize. I did not let you know earlier.我得表示道歉.我没有早一点让你知道.

词性不一样。前面是形容词~后面是动词~

apologetic是形容词。
apologize是动词。